function change_filling_gaps(node){
	node.value = (!isNaN(node.value)) ? node.value : 0;
	document.getElementById("fill_gaps_k103").innerHTML = Math.ceil(node.value/80);
	document.getElementById("fill_gaps_k101").innerHTML = Math.ceil(node.value/12.58);
}

function change_finishing_layer(node){
	node.value = (!isNaN(node.value)) ? node.value : 0;
	document.getElementById("finishing_layer_k101").innerHTML = Math.ceil(node.value/12.58);
}

function change_skim_input(node){
	node.value = (!isNaN(node.value)) ? node.value : 0;
	document.getElementById("skim_coat_k201").innerHTML = Math.ceil((node.value/25) * 16);
}

function change_rendering_input(node){
	node.value = (!isNaN(node.value)) ? node.value : 0;
	document.getElementById("rendering_k222").innerHTML = Math.ceil(node.value/5);
	document.getElementById("rendering_k201").innerHTML = Math.ceil((node.value/25) * 16);
}

function change_basic_input(node){
	node.value = (!isNaN(node.value)) ? node.value : 0;
	document.getElementById("basic_k302").innerHTML = Math.ceil(node.value / 5);
}

function change_tile_on_tile_input(){
	var v = parseFloat(document.getElementById("tile_works_vertical_input").value);
	var h = parseFloat(document.getElementById("tile_works_horizontal_input").value);
	
	v = (!isNaN(v)) ? v : 0;
	h = (!isNaN(h)) ? h : 0;
	
	var c46 = (v + h);
	var c52 = v / 9;
	var c53 = h / 9;
	var c55 = (c52 * 3) / 25;
	var c56 = (c53 * 3) / 25;
	
	//var c58 = c56;
	var c60 = c56 * 0.5;
	//var c62 = c55;
	var c64 = c55 * 0.25;
	var c54 = c52 + c53;
	
	/*
	alert(
		"C46: " + c46 + "\n" + 
		"C52: " + c52 + "\n" + 
		"C53: " + c53 + "\n" + 
		"C55: " + c55 + "\n" + 
		"C56: " + c56 + "\n" + 
		"C60: " + c60 + "\n" + 
		"C64: " + c64 + "\n" + 
		"C54: " + c54 + "\n"
	);
	*/
	
	//document.getElementById("tile_on_tile_k321").innerHTML = Math.ceil(c54 + c60 + c64);
	document.getElementById("tile_on_tile_k302").innerHTML = Math.ceil(c55 + c56 + (c46 / 5));
}

function change_heavy_duty(node){
	node.value = (!isNaN(node.value)) ? node.value : 0;
	document.getElementById("heavy_duty_k321_bags").innerHTML = Math.ceil(node.value/5);
	//document.getElementById("heavy_duty_k321_liters").innerHTML = Math.ceil((node.value/5) * 0.25);
}

function clearAll(){
	clearInput('filling_gaps_input','fill_gaps_k103','fill_gaps_k101');
	clearInput('finishing_layer_input','finishing_layer_k101');
	clearInput('skim_coat_input','skim_coat_k201');
	clearInput('rendering_input', 'rendering_k222', 'rendering_k201');
	clearInput('basic_input','basic_k302');
	clearInput('tile_works_horizontal_input', 'tile_on_tile_k321');
	clearInput('tile_works_vertical_input', 'tile_on_tile_k302');
	clearInput('heavy_duty_input', 'heavy_duty_k321_bags', 'heavy_duty_k321_liters')
}

function clearInput(inputId){
	document.getElementById(inputId).value='';
	
	for(var i = 1; i< arguments.length;i++){
		document.getElementById(arguments[i]).innerHTML = "";
	}
}

function showCalcDiv(node){
	var options = node.options;
	for(i=0;i<options.length;i++){
		if(node.selectedIndex != i){
			document.getElementById("calc_div_" + options[i].value ).style.display = "none";
		}else{
			document.getElementById("calc_div_" + options[i].value ).style.display = "block";
		}
	}
}